height = eval(input("请输入身高（米）："))
weight = eval(input("请输入体重（公斤）："))
bmi = weight / pow(height, 2)
print("BMI数值为:{:.2f}".format(bmi))
who = ""
if bmi < 18.5:
    who = "过轻"
elif bmi < 25:
    who = "正常"
elif bmi < 28:
    who = "过重"
elif bmi < 32:
    who = "肥胖"
else:
    who = "严重肥胖"
print("BMI指标为：{}".format(who))